Road-scraper.



PATENTED MAR 24, 1903.

J. 1). OLGOTT.

ROAD SORAPER; APPLICATION FILED 0033.15, 1900.

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THE mums vmzas co.. Funny-LUNG" msnlunnw. ale;

V No, 723,619. V 'PATENTEDMAR. 24, 1903.

J. 1).- OLGOTT: ROAD SGRAPBR. APPLICATION PILBI; OUT. 15, 1900.

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30 MODEL- No. 723,619. v PATENTED MAR. 24, 1903.

I J. D. OLUOTT.

ROAD SGRAPER.

APPLIOATLON nun 00-1215, 1900. Io MODEL. 9 sums-45mm 4.

' QM. k g I I- fly Mzvzegf No. 723.619. PATENTED MAR. 24, 1903.

J. D. OLOOTT.

ROAD SCRAPER.

APPLIOATION FILED 001215, 1900. I no MODEL. 9 snnnms-snnzw athen Q2- No.'723,619. PATENTED MAR. 24, 1903.

J. D. OLGOTT.

ROAD SGRAPER.

APPLICATION FILED 00115, 1900.

10 MODEL. 9 SHEETS-SHEET 6.

THE cams vzrzns co, Pumau'ruu, WASHINGTON. 0. c.

PA-TENTED MAR. 24, 1903.

J. D. OLGOTT.

ROAD SGRAPER.

APPLICATION FILED 0OT.15, 1900.'

9 SHEBTSSHEET 7.

H0 MODEL.

1 Nonms PEYERS co. PhOTO-LITH PATENTED MAR. 24, 1903.

J. D. OLGOTT. ROAD SGRAPER. APPLIGATION FILED OUT. 15, 1900.

9 SHEETS-SHEET 8- &0 MODEL.

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PATENTED MAR. '24, 1903, J. D.' 0LO0TT. ROAD SGRAPER.

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m w M m jzwaor HZZnesses JOHN D. OLOOTT, OF NORVVALK, OHIO.

ROAD-SCRAPER.

SPECIFICATION forming part of Letters Patent N 0. 723,619, dated March 24, 1903.

Application filed October 15. 1900. Serial No. 33,093. '(No model.)

To (til 1077,0771 it HUT/y concern:

Be it known that I, JOHN D. OLCOTT, a citizen of the United States, and a resident of Norwalk, county of Huron, State of Ohio, have invented certain new'and useful Improvements in RoadScrapers, of which I hereby declare the following to be a full, clear, and exact description, such as will enable others skilled in the art to which it apper tains to make and use the same.

My invention relates to improvements in road-scraping machinery; and the objects of the invention are to provide a form of ma: chine which will be efficient for road work or, ditching and also for finishing subgradingand is so arranged as to be adapted for use on: steep hills, short curves, narrow roads, and in situations where it would be di'fficult to manipulate a machine of the character now constructed. I accomplish these objects by means of several novel features of construction, the leading feature of which ,is found in the location of the scraper-blade in the rear of the machine and connected by means of a long sweeping reach with the front carriage, whereby a great extent of arc can be obtained for the movement of the blade, which reaches beyond the sides of the machine; secondarily, a counterbalance for the weight of the draw-bar so constructed as to be operative at any angle in which the blade may be placed; thirdly, in the low frame and axles placed near together and special construction of front carriage-frame and bearings, whereby greater power, strength,. and freedom of movement are obtained; fourthly, in a digging or rooter bar arranged to loosen the hard surface in advance of the scraper, so that the soil can readily be taken up thereby and in the several adjustments for height or angle of the bar and in the several attachments thereto; fifthly, in independent rear axles and turn-tables therefor, by means of which the rear end of the machine can be thrown quickly from one side to the other and so drive the scraper-blade farther into a bank or withdraw it quickly therefrom when stalled and in operating mechanism therefor; sixtnly, a springactuated anchor to hold the machine from slipping and means for operating the same; seventhly, means for carrying dirt when collected by the scraper, and, eighthly,

a plan view of the device.

section through one of the turn-tables.

whiffletrees can be attached to obtain a rear draft.

My invention further consists in the combination and arrangement of the various adusting and operating devices and construction of details, as hereinafter described, shown in the accompanying drawings, and specifically pointed out in the claims.

In the accompanyingdrawings, Figure 1 is Fig. 2 is a side Fig. 3 is a longitudinal central section. Fig. at is a plan view of front carriage, reach, and front and rear trucks. Fig. 5 is a rear elevation of machine. Fig. 6 is a plan view showing the draft-frame passed through the side of the frame. Fig. '7 is a transverse Fig. 8 is a sectional view of wheel-bearing. Fig. 9 is a detail view of scarifier attachment for the rooter-bar. Fig. 10 is a perspective view of one of the side wings; Fig. 11 is a perspective view of rear circle frame and its various operating appliances. Fig. 12 is a vertical central section therethrough. Fig. 13 is a plan view of front truck, fifth-wheel, and king-bolt connection. Fig. 14: is a transverse vertical section thereof on center line of kingbolt. Fig. 15 is a perspective view of the upper surface of the rooter-bar, and Fig. 16 is a similar view of the lower surface of the same. Fig. 17 is a perspective view of the machine, showing it at work on a roadway.

In the views, 1 is the main frame, which consists of two U-shaped angle or channel bars secured in front to cross-girths 2, upon which the bars 3 of the reach rest, which connects the front and rear truck platforms. The rear-truck platform is rigidly connected with the U-shaped bars at their rear extremities by means of the transverse frame 4, provided with vertical U-shaped extremities and crossgirths 5. The front carriage or truck is formed with a double frame 6, inclosingwith crossgirths 7 the wheels. These wheels 8 are rigidly mounted upon short axles 9, having bearings 10 on either side of the wheels, and the double frame also passes on each side of the fifth-wheel 11 and forms a broad support therefor.

' The rear trucks consist of two turn-tables view.

hinged arms upon the rear frame to which 12, provided with bearings 13 for the short wheel-axles,as in the front truck. These turntables are secured in circular runs 14, provided for them between upper and lower bearings constructed in the frame, as shown in detail in Fig. 7, where 4 is the cross-frame, and 14 is a detachable bottom plate securing the turn-table in place. 15 represents rings which carry the friction-rolls 16. These turn-tables are readily rotated by means of arms 17, projecting forwardly and connected by the link 18. A second link 19, rock-arm 20, pivoted upon the reach, third link 21, andlever 22, pivoted to a transverse shaft 23, serve to move the turn-tables from a convenient point for the operator at the front of the machine, who stands upon a platform 24, (shown in dotted lines in Figs. 2 and 3,) removably placed upon the cross-girths upon the frame, where he can manipulate all the adjusting devices used in operating the machine.

26 is a bar provided with teeth 27, fiat on the bottom and slightly depressed beneath the bottom in ridges at 28 and curved downward or beveled at 29. This plow or rooter-bar is secured at either end to beams 30, which are pivotally secured to the extremities of the links 31. These in turn are pivoted to eyes upon plates 32, which rest upon the crossgirths of the U-shaped frame. By means of these links 31 a vertical movement can be given the plow. This is accomplished by means of the vertical rods 33 and rock-arms 34 upon the shaft 23. A nut 35 upon the rods serve to adjust the elevation of the plow at either end, and springs 36 serve to soften any sudden shock and permit the plow to rise over any obstruction. A worm-wheel 37 upon this shaft engages the worm .38 upon the shaft 39 and is operated by a hand-wheel 40. The angle of presentation of the teeth can be regulated to a nicety by means of the links 41, each pivoted at one endto the extremity of the plow-beam and at the other end to one of the rock-arms 42, secured to the transverse shaft 43, mounted above upon the U-frame. A worm-gear 44 upon this shaft engaging the worm 45 upon.the vertical shaft 46, also provided with a hand-wheel, serves to rotate the shaft and tilt the plow. By means of this plow or rooter with the flat teeth a hard surface can be broken up for the scraper to collect'as it follows and an even cut to grade can be madewith great exactness, the plow being tilted to the exact contour of the road-bed.

At 47 is seen a steel colter-disk which is employed to serve as an anchor to prevent the heavy machine from slipping on a curved road-bed or in mud. This anchor is mounted pivotally in a solid hearing at 48 upon a pivoted bar 49, the inner extremity of which is raised and lowered by means of the link 50, bell-crank 51', pivoted to the reach, and link 52, connecting the rock-arm with the lever 53, loose upon the shaft 23. A spring 54 serves to relieve the device from sudden shock and also serves to create a steady pressure when the lever is locked to force the anchor into the ground. A notched are 55 and lockingpin 56 are employed to secure the lever where desired.

57 is the tongue by means of which the machine is drawn.

58 is the four-horse evener.

59 is the tongue-brace,pivoted to the hounds 60, which are attached to an upright portion of the front carriage, the center of which is elevated to make room under the reach for the front wheels.

61 is a hammer-strap connecting the evenerbolt with the king-bolt, thus relieving the hounds from a part of the strain. This hammerstrap may be made flexible, and thus can be made to raise the tongue until the evenerbolt is detached, when the tongue will drop down. Aspring 62 upon the king-bolt between the hammer-strap and the fifth-wheel relieves the strain upon the fifth-wheel when in a cramped position and also serves to hold the tongue up by its pressure against the hammer-strap by adjusting the nut 63 upon the bolt.

The construction of the reversible scrapingblade, its circle-frame and connections, and the double-draft frame by which it is connected with the king-bolt of the machine, is seen in the various figures and may be described as follows: The draft-frame is seen in Fig. 1 to be pivoted by means of a solid nosepiece 64 upon the king-bolt K in any desirable manner and is formed of two angle-bars 65, connected bycross-girths 66, the rear girth 67 being semicircular to conform to the circleframe 68 below, to which the segment-arms 69, supporting the scraper-blade 70, are secured. The circle-frame is provided with a transverse central girth 71. The circle-frame is pivoted upon the sleeve or tubular kingbolt '72, which also passes through the crossgirth of the draft-frame and througha swaybar 73, between the frames. The brace 80, which assists in supporting the segment-arms, and a support 81 for the lever, which reverses the blade of the scraper, are also sleeved thereon, as will be seen farther on.

To rotate 'the circle-frame and attached segment-arms and scraper, a segment-gear 82 is secured to the bottom edge of the circleframe, which is engaged by the pinion 83,

mounted upon a shaft 84, towhich is also secured the sprocket-wheel 85 This wheel is connected by means of a sprocket-chain 67 to the sprocket-wheel 86 upon a vertical shaft 89, provided also with a hand wheel 88. The circle-frame is locked wherever placed by means of an arm T, mounted upon the support 80 and actuated by the springs to engage notches 89 in the margin of the circular girth oft-he draft-frame. A link 90 and a vertically-moving bar 91., having a lug 92, sliding upon the hand-wheel shaft 93, serve to release the arm from the notches. The shaft 93 passes through the tubular king-bolt and with the sprocket-wheel shaft 84 is supported upon the bars 94 and 95, which are atrear extremity of the machine.

tached to one of the cross-girths of the draftframe. By means of this mechanism the scraper can be placed at any plowing angle or can be placed at right angles to the draftframe. The rear extremity of the draft-frame and the scraper are supported by the balancing-spring 96, which is secured at one extremity to the king-bolt in the front carriage, and the other extremity is attached to a rope or chain 97, which passes under a pulley 98, pivoted upon a cross-girth of the draft-frame. Thence the rope passes to the traveling carriage 11] and is secured to a hook or bolt 99. This spring serves as a counterbalance to the weight of the draft-frame and scraper, so as to relieve the strain upon the lifting mechanism.

The devices by means of which the scraper is raised or lowered are seen clearly in the figures, where 100 100 are short horizontal shafts mounted upon vertical extensions 101 101 of the main frame. Upon these shafts are worms 102 and hand-wheels 103. The worms engage the worm-wheels 103, mounted upon longitudinally-placed crank-shafts 104, provided with cranks 105. These cranks are connected with the sway or oscillating bar 73, placed underneath the draft-frame by means of links 106, and by this means the entire frame and scraper can be raised or lowered, or, since the worm-gears are upon independent shafts, each side can be raised orlowered independently and the scraper placed at any angle required to form the curve of the roadbed or the side of a ditch. In the old form of construction,with the cranks centrally placed in the machine,the cranks could not both turn in the same direction throughout their entire stroke without striking the links against the sides of the frame. Hence the movements of the braft-bar were limited by the sides of the machine. By my improved construction, however, the cranks can be both thrown entirely over in the same direction and at the same time with perfect freedom, since the cranks and links connecting them with the draft-frame are located entirely beyond the Hence a wide sweep of the draft-frame is made possible beyond the wheels on either side, as seen in Fig. 1, the construction of the machine being especially arranged to accomplish this important result. In order to permit a still greater arc of movement to the draft-frame, the rear transverse frame l is provided with U-shaped uprights, which admit the draft-frame in their openings.

The mechanism whereby the draft-frame and scraper-blade can be swung from side to side of the machine and projected as far as possible beyond the machine on either side is seen to consist of a vertical Windlass-shaft 107 and spool 108, upon which is wound a chain or rope 109. This rope passes over pulleys 110 upon the side of the machineframe and thence connects at each end with the traveler 111, which moves upon the segment-track 112, secured to the rear of the upper portion of the machine-frame. A ratchetwheel 113 and pawl 114 upon the Windlass serve to hold the traveler wherever placed.

before-mentioned sway-bar by means of a thrust-link 115, so that the movements of the traveler are instantly conveyed to the draftframe. It will be observed that the sway-bar is free to turn upon the tubular king-bolt, so that the movements of the crank-links and thrust-link 115 will be unimpeded thereby. It will be seen that the scraping portion of the blade is pivoted at 116 to the segmentarms and can readily be reversed to dump a load by means of the lever 117, pivoted at 118 to the support 80, a short arm 119 upon the blade, and a connecting-link 120. The blade is locked by means of the locking-pin 121, adapted to engage openings 122 in the are 123, which is secured to the support 81.

At 127 are seen arms pivoted upon the main frame so as to extend transversely therefrom, upon which eveners or whiftietrees can be attached when a draft fromthe rear is desired. When not in use, they can be folded up against the machine.

At 128 are seen pivoted side wings, which can be lowered upon either side of the scraperblade to enable it to hold its load when full for conveyance to any desired point. The construction of these wings is seen to consist of the side pieces 128, links 129, pivoted loosely at 130 to the main frame, and the pins 131, which move in the'slots 132, so that the wings can be extended to the ends of the blade. Springs 133 then serve to bind the wings in place and at the same time permit of some side movement if an obstruction is encountered or to enable the operator to move the blade slightly from one side to the other. The extremities of the spring are attached to the threaded eyebolts B, which'pass through the rear ends of the wings, and nuts N are employed to regulate the tension. The wings are raised to the position shown in dotted lines in Fig. 11 when not in use.

Several attachments can be added to the rooter-bar to accomplish various purposes, as seen in the figures. 134 is a bottom plate provided with spring-scrapers 135, used in cleaning pavements.

136 136 are colter-disks pivotally mounted upon the extremities of the rooter-bar. These are employed as auxiliary anchors to prevent the machine from sliding into a ditch.

137 is a shaft mounted upon bearings 138 in rooter-bar and is provided with a'system of colter-disks 139, the object of which is to slit sod in advance of the rooter, which cuts through the matted roots, leaving the sod in strips behind, and the following scraper-blade with side wings attached will roll up the sod into rolls convenient y for hauling away.

In Fig. 6 is seen a modified position of the draft-frame and scraping'blade for prelimi nary use, the draft-frame being set outside v This traveler is connected directly with the of the main frame, at one side thereof, and restingagainstit. Inthismannerthcscraper is first employed to cut out the farther side of the ditch or to force the dirt out of the ditch, where it can afterward be removed by the machine in its natural position, as heretofore described, since the machine could not be used at once in the ditch. \Vhen in this position, the auxiliary anchors 136 are of especial use. This is done by detaching the side rods and links from the draft-frame and the thrustrod and the spring and rope from the travel ing carriage and then removing the king-bolt. The draft-frame is detached from the machine, so that the machine can be driven ahead until the draft-frame is dropped behind. Then the rear Wheels can be turned so that by backing angularly the side of the machine will be brought alongside of the draft-frame. The nose of the draft-frame is then raised and is inserted through the side of the machine by backing the machine until the nose piece can be again attached to the kingbolt. The link on that side of the machine nearest the draft-frame is then attached to the inner end of the sway-bar and an additional bar 150 is placed diagonally under the upper portion of the frame and the outer link is connected to one end thereof and the other end of the bar 150 is attached to the other or outer end of the sway-bar. The bar 150 is pivoted at 151 to the frame, which forms a fulcrum-point therefor. The machine is again ready for work, and in this modified position the blade can again be raised and lowered by the hand-wheels, as when in the normal position, and the blade is free to turn to any angle desired or to any pitch desired, which enables it to accomplish work that could not hitherto have been possible.

In Fig. 8 is seen a detail view of the wheelbearings,where 8 is the wheel and 10 the bearings. 152 represents the axles, which are fixed on the wheels 8. The wheels are supplied with hubs 153 into recesses 154, in which the bearings are inserted, so as to make the bearings dust-proof. The bearings are covered by caps 155 (shown as integral) on their exterior faces.

It is especially necessary in a road-scraper where there is unusual side pressure upon the hearings to have a bearing upon each side of each wheel and also that the bearings should be made dust-proof and also be so arranged that they can be lubricated Without removing the wheels. For this reason I have designed the wheel-mounts double for this especial purpose and placed the wheels between the double portions of the frame, so that the axles will be supported on both sides and the wheels will be inclosed rigidly between them, thus producing a m uch stronger and more durable mount.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination with adouble U-shaped frame, and cross-girths, of a double reach securedto the lower girths, a continuous rear frame connecting the rear end of the reach and rear extremities of the U-shaped frame, a front carriage having a raised central portion formed of double transverse sections, a fifth-wheel secured on either side to the said sections, Wheel-bearings on either side of the fifth-wheel in the depressed portions of the carriage, and independent axles therein, and turn-tables provided with bearings for independent rear axles, the said turn-tables being provided with bearings underneath said reach, continuous rear frame and cross-girth, substantially as described.

2. The combination with the reach,of a rear platform secured transversely thereto, turntables arranged to rotate therein, and wheel axles mounted in said turn-tables, substantially as described.

3. The combination with the reach,of a rear platform, of turn-tables arranged to rotate therein,independent wheels and axles mounted in said turn-tables and means for rotating the turn-tables simultaneously, substantially as described.

4:. The combination with the reach,of a rear platform,turn-tables arranged to rotate therein, independent wheel-axles mounted in bearings in said turn-tables, and means for rotating the turn-tables, consisting of arms projecting therefrom,a link connecting the arms, a bell-crank upon the machine-frame, a lever and links connecting the bell-crank lever and a connecting-link between the said arms, sub

stantially as described.

5. In a frame for a scraper-machine, a double U-shaped main frame placed longitudinally of the machine and providedwith crossgirths, a double reach secured to the lower girths, and a frame connecting the rear extremities of the reach and U-shaped frame, consisting of a transverse bar provided with vertically-placed U-shaped extremities, substantially as described.

6. An independent rooter-bar, comprising a bar portion and flat-bottomed teeth projecting therefrom in front and slightly below, in combination with means for raising and lowering the bar and tilting the same to any required angle, and acompression-spring in the lifting device, substantially as described.

7. The combination with a rooter-bar provided with projecting teeth, of supportingbeams, secured at either end of the bar, and pivotally connected with the machine-frame by means of link-bars, means for lifting the rooter-bars, comprising link-rods, and transverse shaft and rock arms, and worm-gearing adapted to actuate the shaft, and means for tilting the rooter-bar, comprising links pivotally attached to the forward extremities of the beam, connecting-links and rock-arms upon a second transverse shaft, and Wormgearing adapted to actuate the shaft, substantially as described.

8. In an anchor for a road-scraper, the coma sway-bar transversely placed between the bination with a colt-erdisk, of a pivoted rock-bar upon which the colter ismounted, a rock shaft and arms, a lever, connecting: links for the rock-arms and the lever, and the pivoted rock-bar, and a spring-tension device, for the operating'mechanism, substantially as described.

9. The combination with a draft-frame,pivotally connected with the king-bolt of the machine, of a circle-frame at its rear extremity, segment-arms secured to said frame,a curved scraper-blade pivoted upon said arms, and means for rotating the circle-frame and blade, consisting of a segmental gear upon the circleframe and a pinion and an adjacent pinionshaft, a hand-wheel shaft passing through the king-bolt, sprocket-wheels upon both said shafts and a chain connecting said sprocketwhee1s,substantially as shown and described.

10. The combination with the main frame, of a draft-frame pivotally secured thereto, a circle-frame underneath the draft-frame, a tubularking-bolt upon which the circle-frame rotates, a sway-bar underneath the draftframe through which the king-bolt passes, segment-arms secured to the circle-frame, and a reversible scraper-blade pivoted thereto, a counterbalance for the draft-frame, and scraper-blade, means for rotating the circleframe, for raising or lowering the sway-bar and draft-frame from either side at the rear end, and for swinglng the draft-frame from side to side of the machine, substantially as described. I

V 11. The combination with the main frame and king-bolt, of a draft-frame pivoted thereto, a circle-frame, segment-arms and scraperblade secured to said circle-frame, and a counterbalance for the said draft-frame, consisting ofa spring-actuated rope secured at the front of the draft-frame and passing under a pulley on the rear extremity of the draft-frame, and to a traveler upon the upper portion of the draft-frame, substantially as described.

12. The combination with the main frame, of a draft-frame pivoted thereon at the forward extremity, a circle-frame, segment-arms and a scraperblade secured thereto, and means for swinging the said draft-frame from side to side of the machine, consisting of a transverse segmental track upon the machineframe, a traveler mounted thereon, a swaybar pivoted upon the draft-frame, a thrust-- rod connecting the traveler and sway-bar, and a Windlass and rope, the said rope passing over pulleys at the ends of the segmental track, and secured at either end to the traveler.

13. The combination with a draft-frame and circle-frame, of segment-arms secured to the circle-frame, a reversible blade pivoted to said arms, a dirt-guard secured to said arms above said blade, a brace between said 4 segment-arms, a brace-bar, extending from said brace to the center of the circle-frame,

circle-frame and draft-frame, a tubular kingbolt passing through said frames, and swaybar and brace-bar, a vertical shaft, passing through said king-bolt and means for rotating said circle-frame from the said shaft, and for locking the same, substantially as described.

14. In combination with the main frame of the machine, a draft frame, and scraperblade secured thereto, and means for raising and loweringvthe frame, consisting of cranks and crank-shafts mounted thereon, wormgear constructed to operate said cranks, and links connecting said cranks with each side of the draft-frame, the said cranks and links being located beyond the rear of the machineframe, and constructed and arranged to move freely, either singly or' simultaneously in either direction.

15. In combination with the main frame of the machine, a draft-frame, circle-frame and scraper secured thereto, a pivoted sway-bar between the draft-frame and circle-frame,

and means for raising and lowering the said.

draft-frame, consisting of cranks and crankshafts mounted upon the machine-frame, and worm gears arranged to operate the said cranks, links connecting the cranks with each end of the said sway-bar, the said cranks, links and sway-bar being so constructed and arranged to operate behind the rear of the machine-frame, and the cranks being free to move in either direction to the full extent of their throw, either singly or simultaneously;

16. The combination with a rooter-bar provided with flatbottomed teeth projecting therefrom in front, and slightly below the bar, of colter-disks pivoted upon either end thereof.

17. The combination with the draft-frame scraper-blade and arranged to fold against the frame when not in use.

ICC

20. The combination with the rear extremmounted upon a transverse shaft, secured upon bearings on said supporting-beams,substantially as described.

22. The combination withadraft-frame and a Ushaped frame constructed and arranged to receive the draft-frame into its side, of a king-bolt to which "the draft is pivoted, andmeans for raising and lowering the draftframe, consisting of cranks and crank-shafts projecting over the rear of the machine-frame, a sway-bar pivoted upon the draft-frame, a link connecting the outer crank with the inner end of the sway-bar, a bar ful'crumed on the machine-frame andattached at one extremity to the outer extremity of the sway-bar, and a link connecting the inner extremity of said fulcrumed bar to the other crank, substantially as described.

23. The combination with the circle-frame and segment-arms connected therewith and projecting beyond the rear end of the machine, of a scraper-blade pivotally secured to said arms and a tilting and locking device for said blade, substantially as described.

24. In combination with a portable frame,

" an independent subgrade rooter-bar, comprisribs-upon the under surface thereof, in combination with means for adjusting the height of either end of the bar to correspond to the contour of the road-bed, and for supporting the bar in position, substantially as described.

26. In a road machine, the combination 7 with an independent rooter-bar,provided with narrow projecting teeth beveled at the upper forward extremity, and a similarly-beveled edge between the teeth, of means for maintaining said bar in a horizontal position beneath the surface at a predetermined depth and at right angles to the roadway, for raising or lowering independently either end of the bar, and for raising and lowering and for tilting the entire bar, substantially as and for the purpose described.

27. In combination with a portable frame, a plow or rooter-bar transversely placed beneath said frame, means for supporting said bar, consisting of plow-beams secured to said bar at their lower extremities, draft-links pivoted to said beams and to said frame, means for raising and lowering the front ends of the plow-beams, to tilt the rooter-bar, and means for raising or lowering the bar, substantially as described.

28. In combination with a portable frame, lugs secured to the front portion thereof and draft-links pivoted on either side of said lugs, curved plow-beams pivotally secured between each pair of draft-links slightly below the curved portion thereof and free to move up and down between said draft-links, a tilting device for said beams, pivotally connected with the front extremity .of each beam, and a rooter-bar connecting the lower extremities of the plow-beams,substantially as described.

29. The combination with a main machineframe, of a draft-frame secured to the front portion thereof, a segmental girth at the rear extremity of said draft-frame, a circle-frame across which said draft-frame extends, and to which frame it is pivotally secured, segm ent-arms and a scraper-blade secured to said circle-frame, and means for locking said circle-frame to said segmental girth, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN 'D. OLOOTT.

Witnesses:

WM. M. MONROE, GEO. 0. WILLET. 

